Abstract
The results of studies of time dependence of conductivity of carbon monooxide sensors based on thin polycrystalline films of tin dioxide in a thermo-cyclic operation mode are presented. Expressions describing the dependences of the sensor response and sensitivity on the CO concentration in gas mixture are obtained. On the basis of these dependences, two methods for determining the concentration of this gas without the use of calibration curves are proposed. It is shown that the sensors of this type in thermo-cyclic operation mode are characterized by rather large values of the response and sensitivity to the effect of CO.
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